SA2005M
ssaammeess
Using the RA, RE and IM inputs
3600
Imax x Vnom x 3
1
The following formulas can be used to calculate the LED
output and motor pulse rates. Note that for the motor pulse
rates shown in the datasheet a MOP pulse followed by a
MON pulse is treated as two energy pulses.
Motor pulses/kWh = 36.8 x RA x
x
ImFactor
1000
Where:
Imax = Meters maximum rated current
Vnom = Meters nominal voltage
RA = 1/3, 2/3 or 3/3 (see Rated RA section)
ImFactor depends on IM:
3600
LED pulses/kWh = 36.8 x RA x Imax x Vnom x 3
1000
1
x
RE
IM = VDD then ImFactor = 16
Where:
IM = PH/DIR then ImFactor = 160
IM = VSS then ImFactor = 1600
Imax = Meters maximum rated current
Vnom = Meters nominal voltage
RA = 1/3, 2/3 or 3/3 (see Rated RA section)
RE = 1 or 4 (see resolution RE section)
The following table shows the combinations for some the common rated conditions. IM is selected so that the counter increments to
the highest possible rate.
Imax
Vmax
RA
RE
IM
LED Pulse rate
(Pulses/kWh)
Motor Pulse
Rate (Pulses/kWh)
10
20
30
40
60
80
230
230
230
230
230
230
PH/DIR
PH/DIR
VDD
PH/DIR or VDD
PH/DIR or VDD
PH/DIR or VDD
VSS or Open
VSS or Open
VSS or Open
VDD
VDD
VDD
VDD
VDD
VDD
3200
1600
1600
3200
3200
1600
800
400
400
200
200
100
PH/DIR
VDD
PH/DIR
ANTI-TAMPER CONDITIONS
The SA2005M caters for the following meter tamper conditions, which are indicated as follows:
Description
Method
Result
One LED is provided for each phase to indicate abnormal
operating conditions.
During normal conditions, the LEDs
are continuously switched on.
Phase
Voltages
Phase Failure,
no voltage
The SA2005M will record the energy
In case of a phase failure, the corresponding LED is
switched off.
consumption accurately under this condition
Phase
The SA2005M will record the energy
In case of phase sequence error, the phase LED’s are flashing
with a repetition rate of approximately 1Hz. The direction LED’s
will show which phases is swapped, by switching the corres-
ponding two direction LED’s off. A connection of a line voltage
to the neutral terminal would be indicated in the same way.
Sequence
Error
consumption accurately under this condition
One LED is provided for each current sensor to indicate
reverse energy flow. If detected, the corresponding LED is
switched off. The SA2005M can be configured to accumulate
the absolute energy consumption for each phase measured,
irrespective of the direction of the energy flow.
Input / Output
Terminals
The SA2005M will record the energy
consumption accurately under this condition
Interchanged
Missing
The architecture of the meter should provide for a good
"phantom neutral" in cases where the neutral is disconnected
from the meter.
In this case, the meter would register the
energy consumption correct.
Neutral
Connection
Return
The SA2005M will therefore record the energy consumption
A indication for this condition could be
realized external to the IC.
through Earth accurately under this condition.
The SA2005M will record the energy
Load
consumption accurately under this condition
Imbalance
6/12
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